Jacks



July 7, 1925. 1,545,223

M. wEsTRA-rE JACK Filed Apl 1, 1925 A TTORNE Y.

Patented July '7, i925. l I

, l.warren s'rArs iira'rrimwy WESTRATE, cian-alemn mirrns, irIcHIGAN.

applicaties mp4 prix l1, i925. -se'rial No. 19,843.

To aZZwhom it may cof/wem.'

. .Be it known that I, MATTHEW WESTRATE; a citizen of theJUnitedfStates,residing at (handRapids, inthe county .of Kent and State of Michigan,have invented new4 andv useful Improvements in Jacks, of which the'following is a specification.

.The present invention relates to meclianical organizations and thesamein connection Kwith-jacks and the like; and its object is to providean improved mechanical organizationfof the character hereinafter dethelike is scribed, and the same in connection with a lifting jack.

This and any other objects hereinafter appearing are attained by', fandthe invention finds preferable embodimenty in, the mechanism'hereinafter particularly described in the body of this specificationand illustrated by the accompanying drawings, in which Figure 1 is asideView of a jack;

Figure 2 is a verticall central sectional..

view of a portionthereof;

Fi ure 3 is a horizontal sectional 'View o?l certam parts'taken on line3-3 of Figures v1 and 2;

Figure 4 is a horizontal sectional view of certainparts taken on line4.-'4..of Figure l; Figure 5 is en -end view of certain parts; Figure 6is avertioal sectional view of certain parts taken on line 6-6 of Figure1 arms 4, -5, carrying the top member. 6 adaptfl edto engage the axle orother art of the automobile being raised. Each o these arms isv formedof parallel members as indicated in various views, the upper ends ofeachl:pair of arms being swingably connected to the lower ends of the pairabove,'by bolts 7-passing through spacing sleeves 8, except that theupper ends of the short uppermost pair are swingably connected by a bolt9 to the top member 6; and the arms of each pair (except the uppermostpair of short arms) being swingably /connected in the middle.

In the lowermost pair of arms-being arms 2 and 3-y-suchswingableconnection is efected by Ibolts 10l passing through theirmiddle portion and tireaded in a block 11.

This block has an axially 'vertical `bore 20v in whi-cha nut 12 vhas anaxial movement limited by its' radial flange 13'b'elow the block, thisnut being held non-turnably in axially verticalscrew 16'isl 'journalledat 17 on the base 1 andxisthrealded in the nut 12.

the bore 20 by means'of its spline 14 slidf l able 1n the keyway 15, ofthe block. An

The lower ends. ofthe lowermost pair 2, 3

of the armsare'swingably connecte 'by bolts 18, 19 to a pairof blocks40,. 41 respectively,

which are slidably movable horizontally in the gi`11des 22, 23 ofthebase. These blocks' 40, 41 have axially horizontal bores 24 in whichnuts 25, 26 respectively have an axial movement limited by their radialvflanges 27 adjacent the outer ends of the blocks, these nuts 25,26being held non-turnably -in the bores 24 by meansof their said langesber' ing slidably guided inthe guides 22, 23. A horizontally axial shaft28 journalled at 30 1n the base `has right-hand and left-hand -screwportions 31, 32A threaded in the nuts 25, 26,-respective1y. A bevel'gear33 on the vshaft 28 meshes with lthe bevel gear'34' on the verticalscrew 16, so that the rotation of this shaft will rotatesa'id screw.

In the position ofthe parts seen in Fig- -ure 1, the arms 2 and 4 areapproximately at right angles to the other arms 3 and 5 of therespective'pairsl thereof, thej radial flange l1 3 of nut l12 engagingthe lower end. of the block 11 and the radial llanges'27 of the pair,of,nuts 25,26engagingthe outer ends o-f the pair` of blocks 40 and.- 41

respectively. i

Inthis position, ,the flange 13 is about to disengage the block 11 andthe flanges 27 have just l been brought into engagement vwith the blocks40, 41 in the operative or raising f'movementv of after explained.

WVhen the top member 6 is its lowest i position (the lazy-tongsstructure being vertically collapsed), the lower ends of the arms 2 and3 are separated to their farthest Vthe jack, as herein-y extent, theflanges 27 being farthest away from the blocks 40 and 41-respectively,and the block 11 rests on the flange 13. The shaft 28 being now rotatedto raise the top member 6 in the jacks operative movement,

' the vertical screw'l is rotated,` thus raising the nut'51'2 and block11 with it and causing the top member 6 to rise. During this operation,the flanges 27 approach their blocks ll, il respectivelyc v When thearms erel raised to approximately the position seen in Figure l, theseanges 2 7 engage vthe blocks All); 41 and thus lcontinue the operativemovement of the jack, but, at this juncture the blochll is carried outof engagemeiit with the flange 13m? not It willv thus be seen that.power to reise the jack is first app-lied to. the block ll, land then tothe .block-s 4G' and il to continue such lll raising movement, the powerthus operating to the best advantage in either case.,

A coiled spring 55 is desirably providedv .between the block ll`end'flengell to cushl scribedzswingab-ly connected arms; ineens ion -thetransition of operation between block ll and blocks 40 and el. A crankSnot shown) ma f be applied to the driving sieft connected by auniversal joint 5i ,to the shaft 28, and this shaft 50 may be laterellgTmoved in a vertical direction into end out cfa beeriog 52, 'on the base,openn ing upwardly at 53, provided for the purpose of folding the partstogether ccm-4 pectly, .l

lit' will be seen. thet tlm mechanical organizatioii. abovedescribed maybe applied4 to other uses than to operate` c liftingl Ajack, and desireto claim, the same broad y. The invention being intended be pointed outin theclaims, ienotto be llmited or by details of' construction of theper-f ticular embodiment thereof illustrated,- by the drawingsorhereinbefore described.

I'cleim: 1. In `mecl'ianism of the character' de- 'acting upon' the endsof the arms for causing an interreletive movement thereof to a limitedposition; means operable in coni nection with the first-mentionedIneens, and acting upon the armsfadjacent their swing able Ycomiectionand iml a. direction= trans verse to the direction of the action ofthe"Y .first-mentioned ineens? for continuing said movement of the armsfrom lsaid position.

f2. In mechanism ofthe characterdescribed: swingebly connected' armsthreaded means acting upon the'endsof the arms for causing: aninterrelative movement there of; threaded nieces operable in connectionwith the first-mentioned means, and acting upon the arms 'adjacent theirswinggcble `conne-lotion and in adirection transverse to the direction.of the action of the first-mentioned means-for conti'miing said movementof thee-rms,

, 3. In mechanism of the character describedx'a bese; a block; armsswingably connected to the block and having ends in-1 tei'reletively`movable horizontally a nut lia-ving a non-turning limited ax1al .movemment relatively to the block; a screw journalled on the bese andthreaded in the nut;

Lees-,eee

a bloeit horizontally movable on the bese and swingably carrying an endof an arm; a

nut having a noi-turning limited' axial \ment reletiveljgr to the'block;a screw jour" nailed on the base and threaded in the nut; a blockhorizontally movable on the basey and sivingablv carrying an end of enarm; a mit having -a non-turning limited axial movement relativelyto thelastwmentioned block; a sc1;.efeT journclled on the base and. threadedin the lestonentioned mit; ineensv for rotating one of the screws by"the rotation 'of the other;V cushioning means interinou diate ooe oftheblocks end the not axially movable relatively theretoa 5. ln mechanismci the character dem' scribed: a, bese; a block; armev swingablyconnected to the blocliand having ends interrelat-ively movablehorizontelly; a nuthavingL a nonturning limited axial movementrelatively tothe block; e. screw jour-f nalled on the bese and threadedin the not;

a peil of blocks horizontally movable 'on the bese and svvingeblycarrying seid ends respectively; e pair ot nuts having a lioneAturningdiinited axial movement relatively to the blocks respectivel;r ofsaid pairthereof; ,schaft jocnalled on the bese' end havmg rdglithand.sind lett-hond threed in' vthe nuts respectively7 of said screwportions pair; Ineens intermediate the screw andA thev j shaft forrotating one-by the rotation of v mechanism of the character deuscribed: a bese; a block; armsetvingably connected to the' block andhaving? ends interrelatively movable horizontally; a mit havingaJnon-turning limited civiel movenallegl on the bajseand threaded in thenut; a Ypair of blocks horizontally movable on the base and swingablycerryingj said ends respectively; a" pair of vmitshaving anonm turninglimited; axial' movement relatively to the blocks respectively of seidpair there'- of; a 'shaft journalled on the base and having 'right-bendand left-hand screw, portions threaded in the nuts respectively of, saidpair; meshing, gears on the screw and ebelt respectively.

7. ln mechanism Aof vthe character demi I scribed: aA base having; en uvverdly-open bearin to vthe il movable horizontally; a mit having anonea e block; arms stringa ly connected ook and having endsinterrcletively' im yment vrelatively to the block; a screwjour-1,545,2aa y .turning limited axiall movement relatively to the block; ascrew journalled on the base and threaded in the nut; a blockhorizonltally movable on the base @and swingably carrying an end of anarm; a nut having a non-turnlng'hmlted axlal movement relatively to thelast-mentioned block; a screw v journalled on the base and threaded inthe last-mentioned nut; means for rotating` one of the screws by therotation 'of the other;

a shaft universally-jointed' with the last-l mentioned screvv andlaterally movable into and out of the open bearing.

8. In mechanism of the character de'- scrihed: swngably connected arms;means .acting upon theends of the arms, and means v operable inconnection lwith said means and v acting upon the arms .adjacenttheirswingable connection and in a direction transverse-r other -andone of-said means continuing theA movement of the arms from the Vposition towhich the other of said means-had moved the same.

4In testimon Whereo I have hereunto set my hand at.. randRapids,Michigamfthis 218th day of Mardi7 1925.

MATTHEW WESTRATE; y

